Cancellation of o2 contract please!!!!!

Dear o2 Team,

I had the following issues with my LTE o2 contract:

1. When ordering, the speed stated at my address was up to 50mbit, this is completely wrong, I have 2 bars of LTE signal and download speeds of between 0.09mbit with occasional 1.6mbit.  The mobile mast is only 200 meters away up a hill.  I put the SIM in to my iPhone and wandered up to the mast, 3 bars reception and still very very very bad unreliable speed.  I put in my Telekom SIM in to both my iPhone and LTE router (the recommended FritzBox model) and can achieve download speeds of up to 30mbit with ease.
2. I have worked in the field of IT and Communications since 1998, so I know what I’m doing.
3. I constantly tried to call o2 support and finally after the 6th call, I got through to someone who mentioned I should email what I have written above to impressum.cc.o2.de which is an address that eventually fails after Gmail tries several times to deliver the message.  Average time for even an attempted pickup (before I get hung up on normally) is around 47 minutes.
4. When I log in to the o2 site, every time I click on “My o2”, I get logged out, so I can’t check any of my bills or anything else, not even my personal data.
5. On IOS 14 on an iPhone X, the My o2 app won’t log in (error -1) and I have tried reloading, side-loading and cannot log in to this app.  I even tried 2 o2 SIM cards just in case, and it simply does not work.
6. As I realise, the two week period is over, but you also cannot supply anywhere near the speed of even 2mbit in my location.
7. The nearest tower is namedly Wilkommen in Jesberg, 36432.
8. There is no way I’m paying that amount of money that can’t even stream Netflix for more than 2 minutes without having to load again for another 30 seconds - 1 minute.

Please don’t even recommend an LTE booster (I already had a 21db booster up on the roof for a tower that is only 200 metres away and in clear sight!).

Please please please please cancel my contract, all I can do is stream radio through it, and even that pauses/disconnects every few minutes.  I can replicate the same problems standing under the mast with the LTE SIM in my iPhone and also with my other o2 SIM.

Regards,

Barry ...